The six-storey block went down on April 29 in an impoverished part of Nairobi following days of heavy rain, triggering a desperate search for survivors.

Overall, 140 people were rescued, said Pius Masai, the head of Kenya's natural disaster management unit.

Among the lucky ones was a seven-month-old baby who was miraculously found alive after four days under the rubble. Her mother did not survive. Four other residents were pulled to safety as late as Thursday.

"We have come to the end of this search and rescue operation after recovering 49 bodies for people confirmed dead," said Masai.

Another 47 people remained missing, he added, though it was unclear whether they were actually in the building at the time of the accident.

The recovery operations had in recent days been extended to a river bordering the apartment building, because emergency workers feared some residents may have tried to jump to safety as the building crumbled around them.

The dwelling's collapse has been blamed on a combination of shoddy construction and bad weather.

Located in the poor, tightly-packed Huruma neighbourhood, the building, which housed around 150 families crammed into single rooms, had been slated for demolition after being declared structurally unsound.

But an evacuation order for the structure, built just two years ago, was ignored.

The government, under pressure to take action against unsafe construction practices following the deadly accident, responded by earmarking 78 high-risk buildings in the capital for demolition.

But as the excavators moved in on Friday, local authorities came under fire for not giving adequate notice, and Nairobi governor Evans Kidero on Saturday suspended the demolitions to give residents time to find new accommodation.

Three buildings near the site of the April 29 collapse which have already been evacuated will still be torn down as planned.

Two brothers who owned the apartment building have been released on bail and an inquiry into the accident is ongoing.

Several buildings have collapsed in recent years in Nairobi and other Kenyan cities, where a property boom has seen buildings shoot up at speed, often with scant regard for regulations.